Hello @sujinyoo , I'm Celine from the Figma Community Support team. I've flagged this to our support team and someone will be reaching out to you by email shortly.
For security and privacy reasons, billing matters can't be handled directly here on the Forum. The support team will look into your account directly to identify the exact cause of the charge and advise you accordingly.
For reference, after cancelling a plan, a final invoice can sometimes be issued for any changes (e.g. seat additions) that occurred before the cancellation took effect. You can find more details here: Additional charges in my Figma bill. Please hang tight and the team will get back to you quickly. Thank you! 🙏
Update: The support agent replied to you . Please check your inbox and continue the conversation directly there when you can. I’ll go ahead and close the topic here, thanks!